PCA9675
NXP Semiconductors
Remote 16-bit I/O expander for Fm+ I2C-bus with interrupt
21. Contents
1
2
3
4
5
General description. . . . . . . . . . . . . . . . . . . . . . 1
19.1
19.2
19.3
19.4
Data sheet status . . . . . . . . . . . . . . . . . . . . . . 32
Definitions . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
Disclaimers . . . . . . . . . . . . . . . . . . . . . . . . . . 32
Trademarks . . . . . . . . . . . . . . . . . . . . . . . . . . 33
Features and benefits . . . . . . . . . . . . . . . . . . . . 1
Applications . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Ordering information. . . . . . . . . . . . . . . . . . . . . 2
Block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . 3
20
21
Contact information . . . . . . . . . . . . . . . . . . . . 33
Contents. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
6
6.1
6.2
Pinning information. . . . . . . . . . . . . . . . . . . . . . 4
Pinning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Pin description . . . . . . . . . . . . . . . . . . . . . . . . . 5
7
Functional description . . . . . . . . . . . . . . . . . . . 6
Device address. . . . . . . . . . . . . . . . . . . . . . . . . 6
Address maps. . . . . . . . . . . . . . . . . . . . . . . . . . 6
Software Reset call, and Device ID
7.1
7.1.1
7.2
addresses. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Software Reset . . . . . . . . . . . . . . . . . . . . . . . . . 9
Device ID (PCA9675 ID field). . . . . . . . . . . . . 10
7.2.1
7.2.2
8
I/O programming . . . . . . . . . . . . . . . . . . . . . . . 12
Quasi-bidirectional I/O architecture . . . . . . . . 12
Writing to the port (Output mode) . . . . . . . . . . 12
Reading from a port (Input mode) . . . . . . . . . 13
Power-on reset . . . . . . . . . . . . . . . . . . . . . . . . 16
Interrupt output (INT) . . . . . . . . . . . . . . . . . . . 16
8.1
8.2
8.3
8.4
8.5
9
Characteristics of the I2C-bus . . . . . . . . . . . . 17
Bit transfer . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
START and STOP conditions . . . . . . . . . . . . . 17
System configuration . . . . . . . . . . . . . . . . . . . 17
Acknowledge . . . . . . . . . . . . . . . . . . . . . . . . . 18
9.1
9.1.1
9.2
9.3
10
Application design-in information . . . . . . . . . 19
Bidirectional I/O expander applications . . . . . 19
High current-drive load applications . . . . . . . . 19
Differences between the PCA9675 and the
10.1
10.2
10.3
PCF8575 . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
11
12
13
14
15
Limiting values. . . . . . . . . . . . . . . . . . . . . . . . . 20
Static characteristics. . . . . . . . . . . . . . . . . . . . 21
Dynamic characteristics . . . . . . . . . . . . . . . . . 22
Package outline . . . . . . . . . . . . . . . . . . . . . . . . 24
Handling information. . . . . . . . . . . . . . . . . . . . 28
16
Soldering of SMD packages . . . . . . . . . . . . . . 28
Introduction to soldering . . . . . . . . . . . . . . . . . 28
Wave and reflow soldering . . . . . . . . . . . . . . . 28
Wave soldering. . . . . . . . . . . . . . . . . . . . . . . . 28
Reflow soldering. . . . . . . . . . . . . . . . . . . . . . . 29
16.1
16.2
16.3
16.4
17
18
19
Abbreviations. . . . . . . . . . . . . . . . . . . . . . . . . . 30
Revision history. . . . . . . . . . . . . . . . . . . . . . . . 31
Legal information. . . . . . . . . . . . . . . . . . . . . . . 32
Please be aware that important notices concerning this document and the product(s)
described herein, have been included in section ‘Legal information’.
© NXP B.V. 2011.
All rights reserved.
For more information, please visit: http://www.nxp.com
For sales office addresses, please send an email to: salesaddresses@nxp.com
Date of release: 3 October 2011
Document identifier: PCA9675
NXP [ NXP ]
